Scaling analysis and direct simulation of unsteady natural convection cooling of fluid with Pr < 1 in a vertical cylinder

Lin, Wenxian, and Armfield, S.W. (2004) Scaling analysis and direct simulation of unsteady natural convection cooling of fluid with Pr < 1 in a vertical cylinder. In: Proceedings of the Fifteenth Australasian Fluid Mechanics Conference 2004, pp. 1-4. From: Fifteenth Australasian Fluid Mechanics Conference 2004, 13-17 December 2004, Sydney, NSW, Australia.

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Abstract

The unsteady natural convection cooling of fluid with Pr < 1 in a vertical cylinder with an imposed lower temperature on vertical sidewalls is dominated by three distinct stages of development, i.e. the boundary-layer development stage adjacent to the sidewall, the stratification stage, and the cooling-down stage, respectively. Various scaling laws to describe the unsteady flow behavior at these respective stages are developed with scaling analysis and are verified and quantified by direct numerical simulation with selected values of the aspect ratio of the cylinder A, the Rayleigh number Ra, and the Prandtl number Pr in the ranges of 1=3 A 3, 106 Ra 1010, and 0:01 Pr 0:5.

Item ID: 11401
Item Type: Conference Item (Refereed Research Paper - E1)
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ISBN: 978-1-86487-695-6
Funders: Australian Research Council, National Natural Science Foundation, China
Date Deposited: 22 Jul 2010 23:34
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 100%
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